Tag Archives: scr

Build your own weather station with our new guide!

Post Syndicated from Richard Hayler original https://www.raspberrypi.org/blog/build-your-own-weather-station/

One of the most common enquiries I receive at Pi Towers is “How can I get my hands on a Raspberry Pi Oracle Weather Station?” Now the answer is: “Why not build your own version using our guide?”

Build Your Own weather station kit assembled

Tadaaaa! The BYO weather station fully assembled.

Our Oracle Weather Station

In 2016 we sent out nearly 1000 Raspberry Pi Oracle Weather Station kits to schools from around the world who had applied to be part of our weather station programme. In the original kit was a special HAT that allows the Pi to collect weather data with a set of sensors.

The original Raspberry Pi Oracle Weather Station HAT – Build Your Own Raspberry Pi weather station

The original Raspberry Pi Oracle Weather Station HAT

We designed the HAT to enable students to create their own weather stations and mount them at their schools. As part of the programme, we also provide an ever-growing range of supporting resources. We’ve seen Oracle Weather Stations in great locations with a huge differences in climate, and they’ve even recorded the effects of a solar eclipse.

Our new BYO weather station guide

We only had a single batch of HATs made, and unfortunately we’ve given nearly* all the Weather Station kits away. Not only are the kits really popular, we also receive lots of questions about how to add extra sensors or how to take more precise measurements of a particular weather phenomenon. So today, to satisfy your demand for a hackable weather station, we’re launching our Build your own weather station guide!

Build Your Own Raspberry Pi weather station

Fun with meteorological experiments!

Our guide suggests the use of many of the sensors from the Oracle Weather Station kit, so can build a station that’s as close as possible to the original. As you know, the Raspberry Pi is incredibly versatile, and we’ve made it easy to hack the design in case you want to use different sensors.

Many other tutorials for Pi-powered weather stations don’t explain how the various sensors work or how to store your data. Ours goes into more detail. It shows you how to put together a breadboard prototype, it describes how to write Python code to take readings in different ways, and it guides you through recording these readings in a database.

Build Your Own Raspberry Pi weather station on a breadboard

There’s also a section on how to make your station weatherproof. And in case you want to move past the breadboard stage, we also help you with that. The guide shows you how to solder together all the components, similar to the original Oracle Weather Station HAT.

Who should try this build

We think this is a great project to tackle at home, at a STEM club, Scout group, or CoderDojo, and we’re sure that many of you will be chomping at the bit to get started. Before you do, please note that we’ve designed the build to be as straight-forward as possible, but it’s still fairly advanced both in terms of electronics and programming. You should read through the whole guide before purchasing any components.

Build Your Own Raspberry Pi weather station – components

The sensors and components we’re suggesting balance cost, accuracy, and easy of use. Depending on what you want to use your station for, you may wish to use different components. Similarly, the final soldered design in the guide may not be the most elegant, but we think it is achievable for someone with modest soldering experience and basic equipment.

You can build a functioning weather station without soldering with our guide, but the build will be more durable if you do solder it. If you’ve never tried soldering before, that’s OK: we have a Getting started with soldering resource plus video tutorial that will walk you through how it works step by step.

Prototyping HAT for Raspberry Pi weather station sensors

For those of you who are more experienced makers, there are plenty of different ways to put the final build together. We always like to hear about alternative builds, so please post your designs in the Weather Station forum.

Our plans for the guide

Our next step is publishing supplementary guides for adding extra functionality to your weather station. We’d love to hear which enhancements you would most like to see! Our current ideas under development include adding a webcam, making a tweeting weather station, adding a light/UV meter, and incorporating a lightning sensor. Let us know which of these is your favourite, or suggest your own amazing ideas in the comments!

*We do have a very small number of kits reserved for interesting projects or locations: a particularly cool experiment, a novel idea for how the Oracle Weather Station could be used, or places with specific weather phenomena. If have such a project in mind, please send a brief outline to [email protected], and we’ll consider how we might be able to help you.

The post Build your own weather station with our new guide! appeared first on Raspberry Pi.

Flight Sim Company Threatens Reddit Mods Over “Libelous” DRM Posts

Post Syndicated from Andy original https://torrentfreak.com/flight-sim-company-threatens-reddit-mods-over-libellous-drm-posts-180604/

Earlier this year, in an effort to deal with piracy of their products, flight simulator company FlightSimLabs took drastic action by installing malware on customers’ machines.

The story began when a Reddit user reported something unusual in his download of FlightSimLabs’ A320X module. A file – test.exe – was being flagged up as a ‘Chrome Password Dump’ tool, something which rang alarm bells among flight sim fans.

As additional information was made available, the story became even more sensational. After first dodging the issue with carefully worded statements, FlightSimLabs admitted that it had installed a password dumper onto ALL users’ machines – whether they were pirates or not – in an effort to catch a particular software cracker and launch legal action.

It was an incredible story that no doubt did damage to FlightSimLabs’ reputation. But the now the company is at the center of a new storm, again centered around anti-piracy measures and again focused on Reddit.

Just before the weekend, Reddit user /u/walkday reported finding something unusual in his A320X module, the same module that caused the earlier controversy.

“The latest installer of FSLabs’ A320X puts two cmdhost.exe files under ‘system32\’ and ‘SysWOW64\’ of my Windows directory. Despite the name, they don’t open a command-line window,” he reported.

“They’re a part of the authentication because, if you remove them, the A320X won’t get loaded. Does someone here know more about cmdhost.exe? Why does FSLabs give them such a deceptive name and put them in the system folders? I hate them for polluting my system folder unless, of course, it is a dll used by different applications.”

Needless to say, the news that FSLabs were putting files into system folders named to make them look like system files was not well received.

“Hiding something named to resemble Window’s “Console Window Host” process in system folders is a huge red flag,” one user wrote.

“It’s a malware tactic used to deceive users into thinking the executable is a part of the OS, thus being trusted and not deleted. Really dodgy tactic, don’t trust it and don’t trust them,” opined another.

With a disenchanted Reddit userbase simmering away in the background, FSLabs took to Facebook with a statement to quieten down the masses.

“Over the past few hours we have become aware of rumors circulating on social media about the cmdhost file installed by the A320-X and wanted to clear up any confusion or misunderstanding,” the company wrote.

“cmdhost is part of our eSellerate infrastructure – which communicates between the eSellerate server and our product activation interface. It was designed to reduce the number of product activation issues people were having after the FSX release – which have since been resolved.”

The company noted that the file had been checked by all major anti-virus companies and everything had come back clean, which does indeed appear to be the case. Nevertheless, the critical Reddit thread remained, bemoaning the actions of a company which probably should have known better than to irritate fans after February’s debacle. In response, however, FSLabs did just that once again.

In private messages to the moderators of the /r/flightsim sub-Reddit, FSLabs’ Marketing and PR Manager Simon Kelsey suggested that the mods should do something about the thread in question or face possible legal action.

“Just a gentle reminder of Reddit’s obligations as a publisher in order to ensure that any libelous content is taken down as soon as you become aware of it,” Kelsey wrote.

Noting that FSLabs welcomes “robust fair comment and opinion”, Kelsey gave the following advice.

“The ‘cmdhost.exe’ file in question is an entirely above board part of our anti-piracy protection and has been submitted to numerous anti-virus providers in order to verify that it poses no threat. Therefore, ANY suggestion that current or future products pose any threat to users is absolutely false and libelous,” he wrote, adding:

“As we have already outlined in the past, ANY suggestion that any user’s data was compromised during the events of February is entirely false and therefore libelous.”

Noting that FSLabs would “hate for lawyers to have to get involved in this”, Kelsey advised the /r/flightsim mods to ensure that no such claims were allowed to remain on the sub-Reddit.

But after not receiving the response he would’ve liked, Kelsey wrote once again to the mods. He noted that “a number of unsubstantiated and highly defamatory comments” remained online and warned that if something wasn’t done to clean them up, he would have “no option” than to pass the matter to FSLabs’ legal team.

Like the first message, this second effort also failed to have the desired effect. In fact, the moderators’ response was to post an open letter to Kelsey and FSLabs instead.

“We sincerely disagree that you ‘welcome robust fair comment and opinion’, demonstrated by the censorship on your forums and the attempted censorship on our subreddit,” the mods wrote.

“While what you do on your forum is certainly your prerogative, your rules do not extend to Reddit nor the r/flightsim subreddit. Removing content you disagree with is simply not within our purview.”

The letter, which is worth reading in full, refutes Kelsey’s claims and also suggests that critics of FSLabs may have been subjected to Reddit vote manipulation and coordinated efforts to discredit them.

What will happen next is unclear but the matter has now been placed in the hands of Reddit’s administrators who have agreed to deal with Kelsey and FSLabs’ personally.

It’s a little early to say for sure but it seems unlikely that this will end in a net positive for FSLabs, no matter what decision Reddit’s admins take.

Source: TF, for the latest info on copyright, file-sharing, torrent sites and more. We also have VPN reviews, discounts, offers and coupons.

Kernel 4.17 released

Post Syndicated from corbet original https://lwn.net/Articles/756373/rss

Linus has released the 4.17 kernel, which
will indeed be called “4.17”.
No, I didn’t call it 5.0, even though all the git object count
numerology was in place for that. It will happen in the not _too_
distant future, and I’m told all the release scripts on kernel.org are
ready for it, but I didn’t feel there was any real reason for it.

Headline features in this release include
improved load estimation in the CPU
scheduler,
raw
BPF tracepoints
,
lazytime support in the XFS filesystem,
full in-kernel TLS protocol support,
histogram triggers for tracing,
mitigations for the latest Spectre variants,
and, of course, the removal of support for eight unloved processor
architectures.

When Joe Public Becomes a Commercial Pirate, a Little Knowledge is Dangerous

Post Syndicated from Andy original https://torrentfreak.com/joe-public-becomes-commercial-pirate-little-knowledge-dangerous-180603/

Back in March and just a few hours before the Anthony Joshua v Joseph Parker fight, I got chatting with some fellow fans in the local pub. While some were intending to pay for the fight, others were going down the Kodi route.

Soon after the conversation switched to IPTV. One of the guys had a subscription and he said that his supplier would be along shortly if anyone wanted a package to watch the fight at home. Of course, I was curious to hear what he had to say since it’s not often this kind of thing is offered ‘offline’.

The guy revealed that he sold more or less exclusively on eBay and called up the page on his phone to show me. The listing made interesting reading.

In common with hundreds of similar IPTV subscription offers easily findable on eBay, the listing offered “All the sports and films you need plus VOD and main UK channels” for the sum of just under £60 per year, which is fairly cheap in the current market. With a non-committal “hmmm” I asked a bit more about the guy’s business and surprisingly he was happy to provide some details.

Like many people offering such packages, the guy was a reseller of someone else’s product. He also insisted that selling access to copyrighted content is OK because it sits in a “gray area”. It’s also easy to keep listings up on eBay, he assured me, as long as a few simple rules are adhered to. Right, this should be interesting.

First of all, sellers shouldn’t be “too obvious” he advised, noting that individual channels or channel lists shouldn’t be listed on the site. Fair enough, but then he said the most important thing of all is to have a disclaimer like his in any listing, written as follows:

“PLEASE NOTE EBAY: THIS IS NOT A DE SCRAMBLER SERVICE, I AM NOT SELLING ANY ILLEGAL CHANNELS OR CHANNEL LISTS NOR DO I REPRESENT ANY MEDIA COMPANY NOR HAVE ACCESS TO ANY OF THEIR CONTENTS. NO TRADEMARK HAS BEEN INFRINGED. DO NOT REMOVE LISTING AS IT IS IN ACCORDANCE WITH EBAY POLICIES.”

Apparently, this paragraph is crucial to keeping listings up on eBay and is the equivalent of kryptonite when it comes to deflecting copyright holders, police, and Trading Standards. Sure enough, a few seconds with Google reveals the same wording on dozens of eBay listings and those offering IPTV subscriptions on external platforms.

It is, of course, absolutely worthless but the IPTV seller insisted otherwise, noting he’d sold “thousands” of subscriptions through eBay without any problems. While a similar logic can be applied to garlic and vampires, a second disclaimer found on many other illicit IPTV subscription listings treads an even more bizarre path.

“THE PRODUCTS OFFERED CAN NOT BE USED TO DESCRAMBLE OR OTHERWISE ENABLE ACCESS TO CABLE OR SATELLITE TELEVISION PROGRAMS THAT BYPASSES PAYMENT TO THE SERVICE PROVIDER. RECEIVING SUBSCRIPTION/BASED TV AIRTIME IS ILLEGAL WITHOUT PAYING FOR IT.”

This disclaimer (which apparently no sellers displaying it have ever read) seems to be have been culled from the Zgemma site, which advertises a receiving device which can technically receive pirate IPTV services but wasn’t designed for the purpose. In that context, the disclaimer makes sense but when applied to dedicated pirate IPTV subscriptions, it’s absolutely ridiculous.

It’s unclear why so many sellers on eBay, Gumtree, Craigslist and other platforms think that these disclaimers are useful. It leads one to the likely conclusion that these aren’t hardcore pirates at all but regular people simply out to make a bit of extra cash who have received bad advice.

What is clear, however, is that selling access to thousands of otherwise subscription channels without permission from copyright owners is definitely illegal in the EU. The European Court of Justice says so (1,2) and it’s been backed up by subsequent cases in the Netherlands.

While the odds of getting criminally prosecuted or sued for reselling such a service are relatively slim, it’s worrying that in 2018 people still believe that doing so is made legal by the inclusion of a paragraph of text. It’s even more worrying that these individuals apparently have no idea of the serious consequences should they become singled out for legal action.

Even more surprisingly, TorrentFreak spoke with a handful of IPTV suppliers higher up the chain who also told us that what they are doing is legal. A couple claimed to be protected by communication intermediary laws, others didn’t want to go into details. Most stopped responding to emails on the topic. Perhaps most tellingly, none wanted to go on the record.

The big take-home here is that following some important EU rulings, knowingly linking to copyrighted content for profit is nearly always illegal in Europe and leaves people open for targeting by copyright holders and the authorities. People really should be aware of that, especially the little guy making a little extra pocket money on eBay.

Of course, people are perfectly entitled to carry on regardless and test the limits of the law when things go wrong. At this point, however, it’s probably worth noting that IPTV provider Ace Hosting recently handed over £600,000 rather than fight the Premier League (1,2) when they clearly had the money to put up a defense.

Given their effectiveness, perhaps they should’ve put up a disclaimer instead?

Source: TF, for the latest info on copyright, file-sharing, torrent sites and more. We also have VPN reviews, discounts, offers and coupons.

Storing Encrypted Credentials In Git

Post Syndicated from Bozho original https://techblog.bozho.net/storing-encrypted-credentials-in-git/

We all know that we should not commit any passwords or keys to the repo with our code (no matter if public or private). Yet, thousands of production passwords can be found on GitHub (and probably thousands more in internal company repositories). Some have tried to fix that by removing the passwords (once they learned it’s not a good idea to store them publicly), but passwords have remained in the git history.

Knowing what not to do is the first and very important step. But how do we store production credentials. Database credentials, system secrets (e.g. for HMACs), access keys for 3rd party services like payment providers or social networks. There doesn’t seem to be an agreed upon solution.

I’ve previously argued with the 12-factor app recommendation to use environment variables – if you have a few that might be okay, but when the number of variables grow (as in any real application), it becomes impractical. And you can set environment variables via a bash script, but you’d have to store it somewhere. And in fact, even separate environment variables should be stored somewhere.

This somewhere could be a local directory (risky), a shared storage, e.g. FTP or S3 bucket with limited access, or a separate git repository. I think I prefer the git repository as it allows versioning (Note: S3 also does, but is provider-specific). So you can store all your environment-specific properties files with all their credentials and environment-specific configurations in a git repo with limited access (only Ops people). And that’s not bad, as long as it’s not the same repo as the source code.

Such a repo would look like this:

project
└─── production
|   |   application.properites
|   |   keystore.jks
└─── staging
|   |   application.properites
|   |   keystore.jks
└─── on-premise-client1
|   |   application.properites
|   |   keystore.jks
└─── on-premise-client2
|   |   application.properites
|   |   keystore.jks

Since many companies are using GitHub or BitBucket for their repositories, storing production credentials on a public provider may still be risky. That’s why it’s a good idea to encrypt the files in the repository. A good way to do it is via git-crypt. It is “transparent” encryption because it supports diff and encryption and decryption on the fly. Once you set it up, you continue working with the repo as if it’s not encrypted. There’s even a fork that works on Windows.

You simply run git-crypt init (after you’ve put the git-crypt binary on your OS Path), which generates a key. Then you specify your .gitattributes, e.g. like that:

secretfile filter=git-crypt diff=git-crypt
*.key filter=git-crypt diff=git-crypt
*.properties filter=git-crypt diff=git-crypt
*.jks filter=git-crypt diff=git-crypt

And you’re done. Well, almost. If this is a fresh repo, everything is good. If it is an existing repo, you’d have to clean up your history which contains the unencrypted files. Following these steps will get you there, with one addition – before calling git commit, you should call git-crypt status -f so that the existing files are actually encrypted.

You’re almost done. We should somehow share and backup the keys. For the sharing part, it’s not a big issue to have a team of 2-3 Ops people share the same key, but you could also use the GPG option of git-crypt (as documented in the README). What’s left is to backup your secret key (that’s generated in the .git/git-crypt directory). You can store it (password-protected) in some other storage, be it a company shared folder, Dropbox/Google Drive, or even your email. Just make sure your computer is not the only place where it’s present and that it’s protected. I don’t think key rotation is necessary, but you can devise some rotation procedure.

git-crypt authors claim to shine when it comes to encrypting just a few files in an otherwise public repo. And recommend looking at git-remote-gcrypt. But as often there are non-sensitive parts of environment-specific configurations, you may not want to encrypt everything. And I think it’s perfectly fine to use git-crypt even in a separate repo scenario. And even though encryption is an okay approach to protect credentials in your source code repo, it’s still not necessarily a good idea to have the environment configurations in the same repo. Especially given that different people/teams manage these credentials. Even in small companies, maybe not all members have production access.

The outstanding questions in this case is – how do you sync the properties with code changes. Sometimes the code adds new properties that should be reflected in the environment configurations. There are two scenarios here – first, properties that could vary across environments, but can have default values (e.g. scheduled job periods), and second, properties that require explicit configuration (e.g. database credentials). The former can have the default values bundled in the code repo and therefore in the release artifact, allowing external files to override them. The latter should be announced to the people who do the deployment so that they can set the proper values.

The whole process of having versioned environment-speific configurations is actually quite simple and logical, even with the encryption added to the picture. And I think it’s a good security practice we should try to follow.

The post Storing Encrypted Credentials In Git appeared first on Bozho's tech blog.

DNS over HTTPS in Firefox

Post Syndicated from corbet original https://lwn.net/Articles/756262/rss

The Mozilla blog has an
article
describing the addition of DNS over HTTPS (DoH) as an optional
feature in the Firefox browser. “DoH support has been added to
Firefox 62 to improve the way Firefox interacts with DNS. DoH uses
encrypted networking to obtain DNS information from a server that is
configured within Firefox. This means that DNS requests sent to the DoH
cloud server are encrypted while old style DNS requests are not
protected.
” The configured server is hosted by Cloudflare, which
has posted this
privacy agreement
about the service.

Amazon SageMaker Updates – Tokyo Region, CloudFormation, Chainer, and GreenGrass ML

Post Syndicated from Randall Hunt original https://aws.amazon.com/blogs/aws/sagemaker-tokyo-summit-2018/

Today, at the AWS Summit in Tokyo we announced a number of updates and new features for Amazon SageMaker. Starting today, SageMaker is available in Asia Pacific (Tokyo)! SageMaker also now supports CloudFormation. A new machine learning framework, Chainer, is now available in the SageMaker Python SDK, in addition to MXNet and Tensorflow. Finally, support for running Chainer models on several devices was added to AWS Greengrass Machine Learning.

Amazon SageMaker Chainer Estimator


Chainer is a popular, flexible, and intuitive deep learning framework. Chainer networks work on a “Define-by-Run” scheme, where the network topology is defined dynamically via forward computation. This is in contrast to many other frameworks which work on a “Define-and-Run” scheme where the topology of the network is defined separately from the data. A lot of developers enjoy the Chainer scheme since it allows them to write their networks with native python constructs and tools.

Luckily, using Chainer with SageMaker is just as easy as using a TensorFlow or MXNet estimator. In fact, it might even be a bit easier since it’s likely you can take your existing scripts and use them to train on SageMaker with very few modifications. With TensorFlow or MXNet users have to implement a train function with a particular signature. With Chainer your scripts can be a little bit more portable as you can simply read from a few environment variables like SM_MODEL_DIR, SM_NUM_GPUS, and others. We can wrap our existing script in a if __name__ == '__main__': guard and invoke it locally or on sagemaker.


import argparse
import os

if __name__ =='__main__':

    parser = argparse.ArgumentParser()

    # hyperparameters sent by the client are passed as command-line arguments to the script.
    parser.add_argument('--epochs', type=int, default=10)
    parser.add_argument('--batch-size', type=int, default=64)
    parser.add_argument('--learning-rate', type=float, default=0.05)

    # Data, model, and output directories
    parser.add_argument('--output-data-dir', type=str, default=os.environ['SM_OUTPUT_DATA_DIR'])
    parser.add_argument('--model-dir', type=str, default=os.environ['SM_MODEL_DIR'])
    parser.add_argument('--train', type=str, default=os.environ['SM_CHANNEL_TRAIN'])
    parser.add_argument('--test', type=str, default=os.environ['SM_CHANNEL_TEST'])

    args, _ = parser.parse_known_args()

    # ... load from args.train and args.test, train a model, write model to args.model_dir.

Then, we can run that script locally or use the SageMaker Python SDK to launch it on some GPU instances in SageMaker. The hyperparameters will get passed in to the script as CLI commands and the environment variables above will be autopopulated. When we call fit the input channels we pass will be populated in the SM_CHANNEL_* environment variables.


from sagemaker.chainer.estimator import Chainer
# Create my estimator
chainer_estimator = Chainer(
    entry_point='example.py',
    train_instance_count=1,
    train_instance_type='ml.p3.2xlarge',
    hyperparameters={'epochs': 10, 'batch-size': 64}
)
# Train my estimator
chainer_estimator.fit({'train': train_input, 'test': test_input})

# Deploy my estimator to a SageMaker Endpoint and get a Predictor
predictor = chainer_estimator.deploy(
    instance_type="ml.m4.xlarge",
    initial_instance_count=1
)

Now, instead of bringing your own docker container for training and hosting with Chainer, you can just maintain your script. You can see the full sagemaker-chainer-containers on github. One of my favorite features of the new container is built-in chainermn for easy multi-node distribution of your chainer training jobs.

There’s a lot more documentation and information available in both the README and the example notebooks.

AWS GreenGrass ML with Chainer

AWS GreenGrass ML now includes a pre-built Chainer package for all devices powered by Intel Atom, NVIDIA Jetson, TX2, and Raspberry Pi. So, now GreenGrass ML provides pre-built packages for TensorFlow, Apache MXNet, and Chainer! You can train your models on SageMaker then easily deploy it to any GreenGrass-enabled device using GreenGrass ML.

JAWS UG

I want to give a quick shout out to all of our wonderful and inspirational friends in the JAWS UG who attended the AWS Summit in Tokyo today. I’ve very much enjoyed seeing your pictures of the summit. Thanks for making Japan an amazing place for AWS developers! I can’t wait to visit again and meet with all of you.

Randall

timeShift(GrafanaBuzz, 1w) Issue 47

Post Syndicated from Blogs on Grafana Labs Blog original https://grafana.com/blog/2018/06/01/timeshiftgrafanabuzz-1w-issue-47/

Welcome to TimeShift We cover a lot of ground this week with posts on general monitoring principles, home automation, how CERN uses open source projects in their particle acceleration work, and more. Have an article you’d like highlighted here? Get in touch.
We’re excited to be a sponsor of Monitorama PDX June 4-6. If you’re going, please be sure and say hello! Latest Release: Grafana 5.1.3 This latest point release fixes a scrolling issue that was reported in Firefox.

1834: The First Cyberattack

Post Syndicated from Bruce Schneier original https://www.schneier.com/blog/archives/2018/05/1834_the_first_.html

Tom Standage has a great story of the first cyberattack against a telegraph network.

The Blanc brothers traded government bonds at the exchange in the city of Bordeaux, where information about market movements took several days to arrive from Paris by mail coach. Accordingly, traders who could get the information more quickly could make money by anticipating these movements. Some tried using messengers and carrier pigeons, but the Blanc brothers found a way to use the telegraph line instead. They bribed the telegraph operator in the city of Tours to introduce deliberate errors into routine government messages being sent over the network.

The telegraph’s encoding system included a “backspace” symbol that instructed the transcriber to ignore the previous character. The addition of a spurious character indicating the direction of the previous day’s market movement, followed by a backspace, meant the text of the message being sent was unaffected when it was written out for delivery at the end of the line. But this extra character could be seen by another accomplice: a former telegraph operator who observed the telegraph tower outside Bordeaux with a telescope, and then passed on the news to the Blancs. The scam was only uncovered in 1836, when the crooked operator in Tours fell ill and revealed all to a friend, who he hoped would take his place. The Blanc brothers were put on trial, though they could not be convicted because there was no law against misuse of data networks. But the Blancs’ pioneering misuse of the French network qualifies as the world’s first cyber-attack.

New – Pay-per-Session Pricing for Amazon QuickSight, Another Region, and Lots More

Post Syndicated from Jeff Barr original https://aws.amazon.com/blogs/aws/new-pay-per-session-pricing-for-amazon-quicksight-another-region-and-lots-more/

Amazon QuickSight is a fully managed cloud business intelligence system that gives you Fast & Easy to Use Business Analytics for Big Data. QuickSight makes business analytics available to organizations of all shapes and sizes, with the ability to access data that is stored in your Amazon Redshift data warehouse, your Amazon Relational Database Service (RDS) relational databases, flat files in S3, and (via connectors) data stored in on-premises MySQL, PostgreSQL, and SQL Server databases. QuickSight scales to accommodate tens, hundreds, or thousands of users per organization.

Today we are launching a new, session-based pricing option for QuickSight, along with additional region support and other important new features. Let’s take a look at each one:

Pay-per-Session Pricing
Our customers are making great use of QuickSight and take full advantage of the power it gives them to connect to data sources, create reports, and and explore visualizations.

However, not everyone in an organization needs or wants such powerful authoring capabilities. Having access to curated data in dashboards and being able to interact with the data by drilling down, filtering, or slicing-and-dicing is more than adequate for their needs. Subscribing them to a monthly or annual plan can be seen as an unwarranted expense, so a lot of such casual users end up not having access to interactive data or BI.

In order to allow customers to provide all of their users with interactive dashboards and reports, the Enterprise Edition of Amazon QuickSight now allows Reader access to dashboards on a Pay-per-Session basis. QuickSight users are now classified as Admins, Authors, or Readers, with distinct capabilities and prices:

Authors have access to the full power of QuickSight; they can establish database connections, upload new data, create ad hoc visualizations, and publish dashboards, all for $9 per month (Standard Edition) or $18 per month (Enterprise Edition).

Readers can view dashboards, slice and dice data using drill downs, filters and on-screen controls, and download data in CSV format, all within the secure QuickSight environment. Readers pay $0.30 for 30 minutes of access, with a monthly maximum of $5 per reader.

Admins have all authoring capabilities, and can manage users and purchase SPICE capacity in the account. The QuickSight admin now has the ability to set the desired option (Author or Reader) when they invite members of their organization to use QuickSight. They can extend Reader invites to their entire user base without incurring any up-front or monthly costs, paying only for the actual usage.

To learn more, visit the QuickSight Pricing page.

A New Region
QuickSight is now available in the Asia Pacific (Tokyo) Region:

The UI is in English, with a localized version in the works.

Hourly Data Refresh
Enterprise Edition SPICE data sets can now be set to refresh as frequently as every hour. In the past, each data set could be refreshed up to 5 times a day. To learn more, read Refreshing Imported Data.

Access to Data in Private VPCs
This feature was launched in preview form late last year, and is now available in production form to users of the Enterprise Edition. As I noted at the time, you can use it to implement secure, private communication with data sources that do not have public connectivity, including on-premises data in Teradata or SQL Server, accessed over an AWS Direct Connect link. To learn more, read Working with AWS VPC.

Parameters with On-Screen Controls
QuickSight dashboards can now include parameters that are set using on-screen dropdown, text box, numeric slider or date picker controls. The default value for each parameter can be set based on the user name (QuickSight calls this a dynamic default). You could, for example, set an appropriate default based on each user’s office location, department, or sales territory. Here’s an example:

To learn more, read about Parameters in QuickSight.

URL Actions for Linked Dashboards
You can now connect your QuickSight dashboards to external applications by defining URL actions on visuals. The actions can include parameters, and become available in the Details menu for the visual. URL actions are defined like this:

You can use this feature to link QuickSight dashboards to third party applications (e.g. Salesforce) or to your own internal applications. Read Custom URL Actions to learn how to use this feature.

Dashboard Sharing
You can now share QuickSight dashboards across every user in an account.

Larger SPICE Tables
The per-data set limit for SPICE tables has been raised from 10 GB to 25 GB.

Upgrade to Enterprise Edition
The QuickSight administrator can now upgrade an account from Standard Edition to Enterprise Edition with a click. This enables provisioning of Readers with pay-per-session pricing, private VPC access, row-level security for dashboards and data sets, and hourly refresh of data sets. Enterprise Edition pricing applies after the upgrade.

Available Now
Everything I listed above is available now and you can start using it today!

You can try QuickSight for 60 days at no charge, and you can also attend our June 20th Webinar.

Jeff;

 

MagPi 70: Home automation with Raspberry Pi

Post Syndicated from Rob Zwetsloot original https://www.raspberrypi.org/blog/magpi-70-home-automation/

Hey folks, Rob here! It’s the last Thursday of the month, and that means it’s time for a brand-new The MagPi. Issue 70 is all about home automation using your favourite microcomputer, the Raspberry Pi.

Cover of The MagPi 70 — Raspberry Pi home automation and tech upcycling

Home automation in this month’s The MagPi!

Raspberry Pi home automation

We think home automation is an excellent use of the Raspberry Pi, hiding it around your house and letting it power your lights and doorbells and…fish tanks? We show you how to do all of that, and give you some excellent tips on how to add even more automation to your home in our ten-page cover feature.

Upcycle your life

Our other big feature this issue covers upcycling, the hot trend of taking old electronics and making them better than new with some custom code and a tactically placed Raspberry Pi. For this feature, we had a chat with Martin Mander, upcycler extraordinaire, to find out his top tips for hacking your old hardware.

Article on upcycling in The MagPi 70 — Raspberry Pi home automation and tech upcycling

Upcycling is a lot of fun

But wait, there’s more!

If for some reason you want even more content, you’re in luck! We have some fun tutorials for you to try, like creating a theremin and turning a Babbage into an IoT nanny cam. We also continue our quest to make a video game in C++. Our project showcase is headlined by the Teslonda on page 28, a Honda/Tesla car hybrid that is just wonderful.

Diddyborg V2 review in The MagPi 70 — Raspberry Pi home automation and tech upcycling

We review PiBorg’s latest robot

All this comes with our definitive reviews and the community section where we celebrate you, our amazing community! You’re all good beans

Teslonda article in The MagPi 70 — Raspberry Pi home automation and tech upcycling

An amazing, and practical, Raspberry Pi project

Get The MagPi 70

Issue 70 is available today from WHSmith, Tesco, Sainsbury’s, and Asda. If you live in the US, head over to your local Barnes & Noble or Micro Center in the next few days for a print copy. You can also get the new issue online from our store, or digitally via our Android and iOS apps. And don’t forget, there’s always the free PDF as well.

New subscription offer!

Want to support the Raspberry Pi Foundation and the magazine? We’ve launched a new way to subscribe to the print version of The MagPi: you can now take out a monthly £4 subscription to the magazine, effectively creating a rolling pre-order system that saves you money on each issue.

The MagPi subscription offer — Raspberry Pi home automation and tech upcycling

You can also take out a twelve-month print subscription and get a Pi Zero W plus case and adapter cables absolutely free! This offer does not currently have an end date.

That’s it for today! See you next month.

Animated GIF: a door slides open and Captain Picard emerges hesitantly

The post MagPi 70: Home automation with Raspberry Pi appeared first on Raspberry Pi.

Hiring a Director of Sales

Post Syndicated from Yev original https://www.backblaze.com/blog/hiring-a-director-of-sales/

Backblaze is hiring a Director of Sales. This is a critical role for Backblaze as we continue to grow the team. We need a strong leader who has experience in scaling a sales team and who has an excellent track record for exceeding goals by selling Software as a Service (SaaS) solutions. In addition, this leader will need to be highly motivated, as well as able to create and develop a highly-motivated, success oriented sales team that has fun and enjoys what they do.

The History of Backblaze from our CEO
In 2007, after a friend’s computer crash caused her some suffering, we realized that with every photo, video, song, and document going digital, everyone would eventually lose all of their information. Five of us quit our jobs to start a company with the goal of making it easy for people to back up their data.

Like many startups, for a while we worked out of a co-founder’s one-bedroom apartment. Unlike most startups, we made an explicit agreement not to raise funding during the first year. We would then touch base every six months and decide whether to raise or not. We wanted to focus on building the company and the product, not on pitching and slide decks. And critically, we wanted to build a culture that understood money comes from customers, not the magical VC giving tree. Over the course of 5 years we built a profitable, multi-million dollar revenue business — and only then did we raise a VC round.

Fast forward 10 years later and our world looks quite different. You’ll have some fantastic assets to work with:

  • A brand millions recognize for openness, ease-of-use, and affordability.
  • A computer backup service that stores over 500 petabytes of data, has recovered over 30 billion files for hundreds of thousands of paying customers — most of whom self-identify as being the people that find and recommend technology products to their friends.
  • Our B2 service that provides the lowest cost cloud storage on the planet at 1/4th the price Amazon, Google or Microsoft charges. While being a newer product on the market, it already has over 100,000 IT and developers signed up as well as an ecosystem building up around it.
  • A growing, profitable and cash-flow positive company.
  • And last, but most definitely not least: a great sales team.

You might be saying, “sounds like you’ve got this under control — why do you need me?” Don’t be misled. We need you. Here’s why:

  • We have a great team, but we are in the process of expanding and we need to develop a structure that will easily scale and provide the most success to drive revenue.
  • We just launched our outbound sales efforts and we need someone to help develop that into a fully successful program that’s building a strong pipeline and closing business.
  • We need someone to work with the marketing department and figure out how to generate more inbound opportunities that the sales team can follow up on and close.
  • We need someone who will work closely in developing the skills of our current sales team and build a path for career growth and advancement.
  • We want someone to manage our Customer Success program.

So that’s a bit about us. What are we looking for in you?

Experience: As a sales leader, you will strategically build and drive the territory’s sales pipeline by assembling and leading a skilled team of sales professionals. This leader should be familiar with generating, developing and closing software subscription (SaaS) opportunities. We are looking for a self-starter who can manage a team and make an immediate impact of selling our Backup and Cloud Storage solutions. In this role, the sales leader will work closely with the VP of Sales, marketing staff, and service staff to develop and implement specific strategic plans to achieve and exceed revenue targets, including new business acquisition as well as build out our customer success program.

Leadership: We have an experienced team who’s brought us to where we are today. You need to have the people and management skills to get them excited about working with you. You need to be a strong leader and compassionate about developing and supporting your team.

Data driven and creative: The data has to show something makes sense before we scale it up. However, without creativity, it’s easy to say “the data shows it’s impossible” or to find a local maximum. Whether it’s deciding how to scale the team, figuring out what our outbound sales efforts should look like or putting a plan in place to develop the team for career growth, we’ve seen a bit of creativity get us places a few extra dollars couldn’t.

Jive with our culture: Strong leaders affect culture and the person we hire for this role may well shape, not only fit into, ours. But to shape the culture you have to be accepted by the organism, which means a certain set of shared values. We default to openness with our team, our customers, and everyone if possible. We love initiative — without arrogance or dictatorship. We work to create a place people enjoy showing up to work. That doesn’t mean ping pong tables and foosball (though we do try to have perks & fun), but it means people are friendly, non-political, working to build a good service but also a good place to work.

Do the work: Ideas and strategy are critical, but good execution makes them happen. We’re looking for someone who can help the team execute both from the perspective of being capable of guiding and organizing, but also someone who is hands-on themselves.

Additional Responsibilities needed for this role:

  • Recruit, coach, mentor, manage and lead a team of sales professionals to achieve yearly sales targets. This includes closing new business and expanding upon existing clientele.
  • Expand the customer success program to provide the best customer experience possible resulting in upsell opportunities and a high retention rate.
  • Develop effective sales strategies and deliver compelling product demonstrations and sales pitches.
  • Acquire and develop the appropriate sales tools to make the team efficient in their daily work flow.
  • Apply a thorough understanding of the marketplace, industry trends, funding developments, and products to all management activities and strategic sales decisions.
  • Ensure that sales department operations function smoothly, with the goal of facilitating sales and/or closings; operational responsibilities include accurate pipeline reporting and sales forecasts.
  • This position will report directly to the VP of Sales and will be staffed in our headquarters in San Mateo, CA.

Requirements:

  • 7 – 10+ years of successful sales leadership experience as measured by sales performance against goals.
    Experience in developing skill sets and providing career growth and opportunities through advancement of team members.
  • Background in selling SaaS technologies with a strong track record of success.
  • Strong presentation and communication skills.
  • Must be able to travel occasionally nationwide.
  • BA/BS degree required

Think you want to join us on this adventure?
Send an email to jobscontact@backblaze.com with the subject “Director of Sales.” (Recruiters and agencies, please don’t email us.) Include a resume and answer these two questions:

  1. How would you approach evaluating the current sales team and what is your process for developing a growth strategy to scale the team?
  2. What are the goals you would set for yourself in the 3 month and 1-year timeframes?

Thank you for taking the time to read this and I hope that this sounds like the opportunity for which you’ve been waiting.

Backblaze is an Equal Opportunity Employer.

The post Hiring a Director of Sales appeared first on Backblaze Blog | Cloud Storage & Cloud Backup.

Monitoring your Amazon SNS message filtering activity with Amazon CloudWatch

Post Syndicated from Rachel Richardson original https://aws.amazon.com/blogs/compute/monitoring-your-amazon-sns-message-filtering-activity-with-amazon-cloudwatch/

This post is courtesy of Otavio Ferreira, Manager, Amazon SNS, AWS Messaging.

Amazon SNS message filtering provides a set of string and numeric matching operators that allow each subscription to receive only the messages of interest. Hence, SNS message filtering can simplify your pub/sub messaging architecture by offloading the message filtering logic from your subscriber systems, as well as the message routing logic from your publisher systems.

After you set the subscription attribute that defines a filter policy, the subscribing endpoint receives only the messages that carry attributes matching this filter policy. Other messages published to the topic are filtered out for this subscription. In this way, the native integration between SNS and Amazon CloudWatch provides visibility into the number of messages delivered, as well as the number of messages filtered out.

CloudWatch metrics are captured automatically for you. To get started with SNS message filtering, see Filtering Messages with Amazon SNS.

Message Filtering Metrics

The following six CloudWatch metrics are relevant to understanding your SNS message filtering activity:

  • NumberOfMessagesPublished – Inbound traffic to SNS. This metric tracks all the messages that have been published to the topic.
  • NumberOfNotificationsDelivered – Outbound traffic from SNS. This metric tracks all the messages that have been successfully delivered to endpoints subscribed to the topic. A delivery takes place either when the incoming message attributes match a subscription filter policy, or when the subscription has no filter policy at all, which results in a catch-all behavior.
  • NumberOfNotificationsFilteredOut – This metric tracks all the messages that were filtered out because they carried attributes that didn’t match the subscription filter policy.
  • NumberOfNotificationsFilteredOut-NoMessageAttributes – This metric tracks all the messages that were filtered out because they didn’t carry any attributes at all and, consequently, didn’t match the subscription filter policy.
  • NumberOfNotificationsFilteredOut-InvalidAttributes – This metric keeps track of messages that were filtered out because they carried invalid or malformed attributes and, thus, didn’t match the subscription filter policy.
  • NumberOfNotificationsFailed – This last metric tracks all the messages that failed to be delivered to subscribing endpoints, regardless of whether a filter policy had been set for the endpoint. This metric is emitted after the message delivery retry policy is exhausted, and SNS stops attempting to deliver the message. At that moment, the subscribing endpoint is likely no longer reachable. For example, the subscribing SQS queue or Lambda function has been deleted by its owner. You may want to closely monitor this metric to address message delivery issues quickly.

Message filtering graphs

Through the AWS Management Console, you can compose graphs to display your SNS message filtering activity. The graph shows the number of messages published, delivered, and filtered out within the timeframe you specify (1h, 3h, 12h, 1d, 3d, 1w, or custom).

SNS message filtering for CloudWatch Metrics

To compose an SNS message filtering graph with CloudWatch:

  1. Open the CloudWatch console.
  2. Choose Metrics, SNS, All Metrics, and Topic Metrics.
  3. Select all metrics to add to the graph, such as:
    • NumberOfMessagesPublished
    • NumberOfNotificationsDelivered
    • NumberOfNotificationsFilteredOut
  4. Choose Graphed metrics.
  5. In the Statistic column, switch from Average to Sum.
  6. Title your graph with a descriptive name, such as “SNS Message Filtering”

After you have your graph set up, you may want to copy the graph link for bookmarking, emailing, or sharing with co-workers. You may also want to add your graph to a CloudWatch dashboard for easy access in the future. Both actions are available to you on the Actions menu, which is found above the graph.

Summary

SNS message filtering defines how SNS topics behave in terms of message delivery. By using CloudWatch metrics, you gain visibility into the number of messages published, delivered, and filtered out. This enables you to validate the operation of filter policies and more easily troubleshoot during development phases.

SNS message filtering can be implemented easily with existing AWS SDKs by applying message and subscription attributes across all SNS supported protocols (Amazon SQS, AWS Lambda, HTTP, SMS, email, and mobile push). CloudWatch metrics for SNS message filtering is available now, in all AWS Regions.

For information about pricing, see the CloudWatch pricing page.

For more information, see:

Randomly generated, thermal-printed comics

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/random-comic-strip-generation-vomit-comic-robot/

Python code creates curious, wordless comic strips at random, spewing them from the thermal printer mouth of a laser-cut body reminiscent of Disney Pixar’s WALL-E: meet the Vomit Comic Robot!

The age of the thermal printer!

Thermal printers allow you to instantly print photos, data, and text using a few lines of code, with no need for ink. More and more makers are using this handy, low-maintenance bit of kit for truly creative projects, from Pierre Muth’s tiny PolaPi-Zero camera to the sound-printing Waves project by Eunice Lee, Matthew Zhang, and Bomani McClendon (and our own Secret Santa Babbage).

Vomiting robots

Interaction designer and developer Cadin Batrack, whose background is in game design and interactivity, has built the Vomit Comic Robot, which creates “one-of-a-kind comics on demand by processing hand-drawn images through a custom software algorithm.”

The robot is made up of a Raspberry Pi 3, a USB thermal printer, and a handful of LEDs.

Comic Vomit Robot Cadin Batrack's Raspberry Pi comic-generating thermal printer machine

At the press of a button, Processing code selects one of a set of Cadin’s hand-drawn empty comic grids and then randomly picks images from a library to fill in the gaps.

Vomit Comic Robot Cadin Batrack's Raspberry Pi comic-generating thermal printer machine

Each image is associated with data that allows the code to fit it correctly into the available panels. Cadin says about the concept behing his build:

Although images are selected and placed randomly, the comic panel format suggests relationships between elements. Our minds create a story where there is none in an attempt to explain visuals created by a non-intelligent machine.

The Raspberry Pi saves the final image as a high-resolution PNG file (so that Cadin can sell prints on thick paper via Etsy), and a Python script sends it to be vomited up by the thermal printer.

Comic Vomit Robot Cadin Batrack's Raspberry Pi comic-generating thermal printer machine

For more about the Vomit Comic Robot, check out Cadin’s blog. If you want to recreate it, you can find the info you need in the Imgur album he has put together.

We ❤ cute robots

We have a soft spot for cute robots here at Pi Towers, and of course we make no exception for the Vomit Comic Robot. If, like us, you’re a fan of adorable bots, check out Mira, the tiny interactive robot by Alonso Martinez, and Peeqo, the GIF bot by Abhishek Singh.

Mira Alfonso Martinez Raspberry Pi

The post Randomly generated, thermal-printed comics appeared first on Raspberry Pi.

FCC Asks Amazon & eBay to Help Eliminate Pirate Media Box Sales

Post Syndicated from Andy original https://torrentfreak.com/fcc-asks-amazon-ebay-to-help-eliminate-pirate-media-box-sales-180530/

Over the past several years, anyone looking for a piracy-configured set-top box could do worse than search for one on Amazon or eBay.

Historically, people deploying search terms including “Kodi” or “fully-loaded” were greeted by page after page of Android-type boxes, each ready for illicit plug-and-play entertainment consumption following delivery.

Although the problem persists on both platforms, people are now much less likely to find infringing devices than they were 12 to 24 months ago. Under pressure from entertainment industry groups, both Amazon and eBay have tightened the screws on sellers of such devices. Now, however, both companies have received requests to stem sales from a completetey different direction.

In a letter to eBay CEO Devin Wenig and Amazon CEO Jeff Bezos first spotted by Ars, FCC Commissioner Michael O’Rielly calls on the platforms to take action against piracy-configured boxes that fail to comply with FCC equipment authorization requirements or falsely display FCC logos, contrary to United States law.

“Disturbingly, some rogue set-top box manufacturers and distributors are exploiting the FCC’s trusted logo by fraudulently placing it on devices that have not been approved via the Commission’s equipment authorization process,” O’Rielly’s letter reads.

“Specifically, nine set-top box distributors were referred to the FCC in October for enabling the unlawful streaming of copyrighted material, seven of which displayed the FCC logo, although there was no record of such compliance.”

While O’Rielly admits that the copyright infringement aspects fall outside the jurisdiction of the FCC, he says it’s troubling that many of these devices are used to stream infringing content, “exacerbating the theft of billions of dollars in American innovation and creativity.”

As noted above, both Amazon and eBay have taken steps to reduce sales of pirate boxes on their respective platforms on copyright infringement grounds, something which is duly noted by O’Rielly. However, he points out that devices continue to be sold to members of the public who may believe that the devices are legal since they’re available for sale from legitimate companies.

“For these reasons, I am seeking your further cooperation in assisting the FCC in taking steps to eliminate the non-FCC compliant devices or devices that fraudulently bear the FCC logo,” the Commissioner writes (pdf).

“Moreover, if your company is made aware by the Commission, with supporting evidence, that a particular device is using a fraudulent FCC label or has not been appropriately certified and labeled with a valid FCC logo, I respectfully request that you commit to swiftly removing these products from your sites.”

In the event that Amazon and eBay take action under this request, O’Rielly asks both platforms to hand over information they hold on offending manufacturers, distributors, and suppliers.

Amazon was quick to respond to the FCC. In a letter published by Ars, Amazon’s Public Policy Vice President Brian Huseman assured O’Rielly that the company is not only dedicated to tackling rogue devices on copyright-infringement grounds but also when there is fraudulent use of the FCC’s logos.

Noting that Amazon is a key member of the Alliance for Creativity and Entertainment (ACE) – a group that has been taking legal action against sellers of infringing streaming devices (ISDs) and those who make infringing addons for Kodi-type systems – Huseman says that dealing with the problem is a top priority.

“Our goal is to prevent the sale of ISDs anywhere, as we seek to protect our customers from the risks posed by these devices, in addition to our interest in protecting Amazon Studios content,” Huseman writes.

“In 2017, Amazon became the first online marketplace to prohibit the sale of streaming media players that promote or facilitate piracy. To prevent the sale of these devices, we proactively scan product listings for signs of potentially infringing products, and we also invest heavily in sophisticated, automated real-time tools to review a variety of data sources and signals to identify inauthentic goods.

“These automated tools are supplemented by human reviewers that conduct manual investigations. When we suspect infringement, we take immediate action to remove suspected listings, and we also take enforcement action against sellers’ entire accounts when appropriate.”

Huseman also reveals that since implementing a proactive policy against such devices, “tens of thousands” of listings have been blocked from Amazon. In addition, the platform has been making criminal referrals to law enforcement as well as taking civil action (1,2,3) as part of ACE.

“As noted in your letter, we would also appreciate the opportunity to collaborate further with the FCC to remove non-compliant devices that improperly use the FCC logo or falsely claim FCC certification. If any FCC non-compliant devices are identified, we seek to work with you to ensure they are not offered for sale,” Huseman concludes.

Source: TF, for the latest info on copyright, file-sharing, torrent sites and more. We also have VPN reviews, discounts, offers and coupons.

Getting Rid of Your Mac? Here’s How to Securely Erase a Hard Drive or SSD

Post Syndicated from Roderick Bauer original https://www.backblaze.com/blog/how-to-wipe-a-mac-hard-drive/

erasing a hard drive and a solid state drive

What do I do with a Mac that still has personal data on it? Do I take out the disk drive and smash it? Do I sweep it with a really strong magnet? Is there a difference in how I handle a hard drive (HDD) versus a solid-state drive (SSD)? Well, taking a sledgehammer or projectile weapon to your old machine is certainly one way to make the data irretrievable, and it can be enormously cathartic as long as you follow appropriate safety and disposal protocols. But there are far less destructive ways to make sure your data is gone for good. Let me introduce you to secure erasing.

Which Type of Drive Do You Have?

Before we start, you need to know whether you have a HDD or a SSD. To find out, or at least to make sure, you click on the Apple menu and select “About this Mac.” Once there, select the “Storage” tab to see which type of drive is in your system.

The first example, below, shows a SATA Disk (HDD) in the system.

SATA HDD

In the next case, we see we have a Solid State SATA Drive (SSD), plus a Mac SuperDrive.

Mac storage dialog showing SSD

The third screen shot shows an SSD, as well. In this case it’s called “Flash Storage.”

Flash Storage

Make Sure You Have a Backup

Before you get started, you’ll want to make sure that any important data on your hard drive has moved somewhere else. OS X’s built-in Time Machine backup software is a good start, especially when paired with Backblaze. You can learn more about using Time Machine in our Mac Backup Guide.

With a local backup copy in hand and secure cloud storage, you know your data is always safe no matter what happens.

Once you’ve verified your data is backed up, roll up your sleeves and get to work. The key is OS X Recovery — a special part of the Mac operating system since OS X 10.7 “Lion.”

How to Wipe a Mac Hard Disk Drive (HDD)

NOTE: If you’re interested in wiping an SSD, see below.

    1. Make sure your Mac is turned off.
    2. Press the power button.
    3. Immediately hold down the command and R keys.
    4. Wait until the Apple logo appears.
    5. Select “Disk Utility” from the OS X Utilities list. Click Continue.
    6. Select the disk you’d like to erase by clicking on it in the sidebar.
    7. Click the Erase button.
    8. Click the Security Options button.
    9. The Security Options window includes a slider that enables you to determine how thoroughly you want to erase your hard drive.

There are four notches to that Security Options slider. “Fastest” is quick but insecure — data could potentially be rebuilt using a file recovery app. Moving that slider to the right introduces progressively more secure erasing. Disk Utility’s most secure level erases the information used to access the files on your disk, then writes zeroes across the disk surface seven times to help remove any trace of what was there. This setting conforms to the DoD 5220.22-M specification.

  1. Once you’ve selected the level of secure erasing you’re comfortable with, click the OK button.
  2. Click the Erase button to begin. Bear in mind that the more secure method you select, the longer it will take. The most secure methods can add hours to the process.

Once it’s done, the Mac’s hard drive will be clean as a whistle and ready for its next adventure: a fresh installation of OS X, being donated to a relative or a local charity, or just sent to an e-waste facility. Of course you can still drill a hole in your disk or smash it with a sledgehammer if it makes you happy, but now you know how to wipe the data from your old computer with much less ruckus.

The above instructions apply to older Macintoshes with HDDs. What do you do if you have an SSD?

Securely Erasing SSDs, and Why Not To

Most new Macs ship with solid state drives (SSDs). Only the iMac and Mac mini ship with regular hard drives anymore, and even those are available in pure SSD variants if you want.

If your Mac comes equipped with an SSD, Apple’s Disk Utility software won’t actually let you zero the hard drive.

Wait, what?

In a tech note posted to Apple’s own online knowledgebase, Apple explains that you don’t need to securely erase your Mac’s SSD:

With an SSD drive, Secure Erase and Erasing Free Space are not available in Disk Utility. These options are not needed for an SSD drive because a standard erase makes it difficult to recover data from an SSD.

In fact, some folks will tell you not to zero out the data on an SSD, since it can cause wear and tear on the memory cells that, over time, can affect its reliability. I don’t think that’s nearly as big an issue as it used to be — SSD reliability and longevity has improved.

If “Standard Erase” doesn’t quite make you feel comfortable that your data can’t be recovered, there are a couple of options.

FileVault Keeps Your Data Safe

One way to make sure that your SSD’s data remains secure is to use FileVault. FileVault is whole-disk encryption for the Mac. With FileVault engaged, you need a password to access the information on your hard drive. Without it, that data is encrypted.

There’s one potential downside of FileVault — if you lose your password or the encryption key, you’re screwed: You’re not getting your data back any time soon. Based on my experience working at a Mac repair shop, losing a FileVault key happens more frequently than it should.

When you first set up a new Mac, you’re given the option of turning FileVault on. If you don’t do it then, you can turn on FileVault at any time by clicking on your Mac’s System Preferences, clicking on Security & Privacy, and clicking on the FileVault tab. Be warned, however, that the initial encryption process can take hours, as will decryption if you ever need to turn FileVault off.

With FileVault turned on, you can restart your Mac into its Recovery System (by restarting the Mac while holding down the command and R keys) and erase the hard drive using Disk Utility, once you’ve unlocked it (by selecting the disk, clicking the File menu, and clicking Unlock). That deletes the FileVault key, which means any data on the drive is useless.

FileVault doesn’t impact the performance of most modern Macs, though I’d suggest only using it if your Mac has an SSD, not a conventional hard disk drive.

Securely Erasing Free Space on Your SSD

If you don’t want to take Apple’s word for it, if you’re not using FileVault, or if you just want to, there is a way to securely erase free space on your SSD. It’s a little more involved but it works.

Before we get into the nitty-gritty, let me state for the record that this really isn’t necessary to do, which is why Apple’s made it so hard to do. But if you’re set on it, you’ll need to use Apple’s Terminal app. Terminal provides you with command line interface access to the OS X operating system. Terminal lives in the Utilities folder, but you can access Terminal from the Mac’s Recovery System, as well. Once your Mac has booted into the Recovery partition, click the Utilities menu and select Terminal to launch it.

From a Terminal command line, type:

diskutil secureErase freespace VALUE /Volumes/DRIVE

That tells your Mac to securely erase the free space on your SSD. You’ll need to change VALUE to a number between 0 and 4. 0 is a single-pass run of zeroes; 1 is a single-pass run of random numbers; 2 is a 7-pass erase; 3 is a 35-pass erase; and 4 is a 3-pass erase. DRIVE should be changed to the name of your hard drive. To run a 7-pass erase of your SSD drive in “JohnB-Macbook”, you would enter the following:

diskutil secureErase freespace 2 /Volumes/JohnB-Macbook

And remember, if you used a space in the name of your Mac’s hard drive, you need to insert a leading backslash before the space. For example, to run a 35-pass erase on a hard drive called “Macintosh HD” you enter the following:

diskutil secureErase freespace 3 /Volumes/Macintosh\ HD

Something to remember is that the more extensive the erase procedure, the longer it will take.

When Erasing is Not Enough — How to Destroy a Drive

If you absolutely, positively need to be sure that all the data on a drive is irretrievable, see this Scientific American article (with contributions by Gleb Budman, Backblaze CEO), How to Destroy a Hard Drive — Permanently.

The post Getting Rid of Your Mac? Here’s How to Securely Erase a Hard Drive or SSD appeared first on Backblaze Blog | Cloud Storage & Cloud Backup.

[$] Stratis: Easy local storage management for Linux

Post Syndicated from jake original https://lwn.net/Articles/755454/rss

Stratis is a new local
storage-management solution for Linux. It can be compared to
ZFS, Btrfs, or LVM. Its focus is on simplicity of concepts and ease of use,
while giving users access to advanced storage features. Internally,
Stratis’s implementation favors tight integration of existing
components instead of the fully-integrated, in-kernel approach that ZFS and
Btrfs use. This has benefits and drawbacks for Stratis, but also greatly
decreases the overall time needed to develop a useful and stable initial
version, which can then be a base for further improvement in later
versions. Subscribers can read on for an introduction to Stratis, by guest
author (and Stratis team lead at Red Hat) Andy Grover.